package main

import (
    "fmt"
    "io"
    "log"
    "net/http"
    "os"
    "strconv"
    "strings"

    "github.com/PuerkitoBio/goquery"
)

// Βρες τον αριθμό των σελίδων
func getPageNumber(page string) int {
    lastPage := 0

    // Request the HTML page.
    res, err := http.Get(page)
    if err != nil {
        log.Fatal(err)
    }
    defer res.Body.Close()
    if res.StatusCode != 200 {
        log.Fatalf("status code error: %d %s", res.StatusCode, res.Status)
    }

    // Load the HTML document
    doc, err := goquery.NewDocumentFromReader(res.Body)
    if err != nil {
        log.Fatal(err)
    }

    doc.Find("body div.eg-container-outer div ul.pagination.pagination-lg.justify-content-center.flex-wrap.m-0.mx-3.pb-4").Each(func(i int, s *goquery.Selection) {
        s.Find("a").Each(func(i int, s *goquery.Selection) {
            link, ok := s.Attr("href")
            if ok {
                title := s.Text()
                if strings.Contains(title, "...") {
                    sliceLink := strings.Split(link, "/")
                    s := sliceLink[len(sliceLink)-2]
                    // string to int
                    lastPage, _ = strconv.Atoi(s)
                }
            }
        })
    })
    return lastPage
}

func ExampleScrape(page string) {
    // Request the HTML page.
    res, err := http.Get(page)
    if err != nil {
        log.Fatal(err)
    }
    defer res.Body.Close()
    if res.StatusCode != 200 {
        log.Fatalf("status code error: %d %s", res.StatusCode, res.Status)
    }

    // Load the HTML document
    doc, err := goquery.NewDocumentFromReader(res.Body)
    if err != nil {
        log.Fatal(err)
    }

    doc.Find("body div.eg-container-outer div.eg-container ul.eg-list").Each(func(i int, s *goquery.Selection) {
        s.Find("a").Each(func(i int, s *goquery.Selection) {
            link, ok := s.Attr("href")
            if ok {
                title := s.Text()

                fmt.Printf("%s [%s]\n", title, link)
            }
        })
    })
}

func GetDownloadLink(page string) {
    // Request the HTML page.
    res, err := http.Get(page)
    if err != nil {
        log.Fatal(err)
    }
    defer res.Body.Close()
    if res.StatusCode != 200 {
        log.Fatalf("status code error: %d %s", res.StatusCode, res.Status)
    }

    // Load the HTML document
    doc, err := goquery.NewDocumentFromReader(res.Body)
    if err != nil {
        log.Fatal(err)
    }

    doc.Find("body div.eg-container.pt-0.pt-sm-3 div.eg-expand.row div.col-md-12.col-lg-4.px-3.mb-3").Each(func(i int, s *goquery.Selection) {
        // test, _ := s.Find("div.col-md-12.col-lg-4.px-3.mb-3").Html()
        //fmt.Println(s.Html())
        action, err := s.Html()
        if err == nil {
            println("Works" + action)
            sliceLink := strings.Split(action, "=")
            println(sliceLink[1])
        }
    })
}

func downloadFile(filepath string, url string) (err error) {

    // Create the file
    out, err := os.Create(filepath)
    if err != nil {
        return err
    }
    defer out.Close()

    // Get the data
    resp, err := http.Get(url)
    if err != nil {
        return err
    }
    defer resp.Body.Close()

    // Writer the body to file
    _, err = io.Copy(out, resp.Body)
    if err != nil {
        return err
    }

    return nil
}

func main() {
    // page := "https://www.emulatorgames.net/roms/gameboy/"
    // var link string
    // lastpage := getPageNumber(page)
    // for i := 1; i <= lastpage; i++ {
    //  if i == 1 {
    //      link = "https://www.emulatorgames.net/roms/gameboy/"
    //  } else {
    //      link = fmt.Sprintf("%s%d/", page, i)
    //  }
    //  ExampleScrape(link)
    // }

    // Get the download link:

    GetDownloadLink("https://www.emulatorgames.net/roms/gameboy/gb-pachislot-hissyouhou-jr/")

    // Download
    // var filename string = "urls.zip"
    // var url1 string = "https://static.emulatorgames.net/roms/gameboy/Akumajou Dracula - Shikkokutaru Zensoukyoku (J) [S][!].zip"

    //downloadFile(filename, url1)
}